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Re: [Amps] filament choke questions

To: Amps <>
Subject: Re: [Amps] filament choke questions
From: "Bill, W6WRT" <>
Date: Fri, 09 Oct 2009 09:40:22 -0700
List-post: <">>

On Thu, 8 Oct 2009 19:57:51 -0400, Don Kessler <> wrote:

>>From a conceptual perspective -- especially at VHF, I think the capacitive 
>coupling between cathode and filament could be significant.  Why shunt 
>cathode drive to ground via the filament?


Very little shunting to ground will be taking place. The capacitance merely
becomes part of the tuned input circuit. 

Having said that however, I agree with others that a filament choke should be
used but for the other reasons they have stated. 

73, Bill W6WRT
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